Academic literature on the topic 'Large area tunable liquid crystal lens'

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Journal articles on the topic "Large area tunable liquid crystal lens"

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Jamali, Afsoon, Douglas Bryant, Yanli Zhang, Anders Grunnet-Jepsen, Achintya Bhowmik, and Philip J. Bos. "Design of a large aperture tunable refractive Fresnel liquid crystal lens." Applied Optics 57, no. 7 (2017): B10. http://dx.doi.org/10.1364/ao.57.000b10.

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Bae, Sang-In, Youngseop Lee, Yeong-Hyeon Seo, and Ki-Hun Jeong. "Antireflective structures on highly flexible and large area elastomer membrane for tunable liquid-filled endoscopic lens." Nanoscale 11, no. 3 (2019): 856–61. http://dx.doi.org/10.1039/c8nr06553e.

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A highly flexible elastomeric membrane with antireflective structures, which enhances light transmittance over the visible range, is successfully integrated into tunable deformable lens for endoscopic application.
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Shen, Yanchun, Zhixiong Shen, Yuye Wang, Degang Xu, and Wei Hu. "Electrically Tunable Terahertz Focusing Modulator Enabled by Liquid Crystal Integrated Dielectric Metasurface." Crystals 11, no. 5 (2021): 514. http://dx.doi.org/10.3390/cryst11050514.

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Active lenses with focal tunable properties are highly desired in the modern imaging systems from the visible to the microwaves. In this paper, we demonstrate a terahertz (THz) lens with electrically switchable focal length. It is composed of a large-birefringence liquid crystal (LC) layer infiltrating a dielectric metasurface. When the birefringence of LC is tuned with an external bias, the phase shift of a single meta-unit will change. With parameter sweep using the finite-different time-domain (FDTD) simulation method, meta-units with varying geometries are optimized to achieve a focal leng
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Duan, Wei, Peng Chen, Shi-Jun Ge, Xiao Liang, and Wei Hu. "A Fast-Response and Helicity-Dependent Lens Enabled by Micro-Patterned Dual-Frequency Liquid Crystals." Crystals 9, no. 2 (2019): 111. http://dx.doi.org/10.3390/cryst9020111.

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Liquid crystals are excellent candidates for tunable optical elements due to their large birefringence and continuous tunability by external fields. A dual-frequency liquid crystal lens integrated with Pancharatnam–Berry phase was fabricated via a dynamic photo-patterning technique. The proposed lens exhibited distinctive polarization-dependent characteristics and ultra-high efficiency rates of up to 95%. Via merely alternating the frequency of the applied electric field, the switching time between unfocused and focused states was measured in submilliseconds. This work supplies a new strategy
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Zhou, Xiang-Yu, Hu Dou, Fan Chu, et al. "P‐11.6: A blue phase liquid crystal lens with large tunable focal length range using different birefringence materials." SID Symposium Digest of Technical Papers 50, S1 (2019): 920. http://dx.doi.org/10.1002/sdtp.13693.

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Palffy-Muhoray, Peter, Wenyi Cao, Michele Moreira, Bahman Taheri, and Antonio Munoz. "Photonics and lasing in liquid crystal materials." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 364, no. 1847 (2006): 2747–61. http://dx.doi.org/10.1098/rsta.2006.1851.

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Owing to fundamental reasons of symmetry, liquid crystals are soft materials. This softness allows long length-scales, large susceptibilities and the existence of modulated phases, which respond readily to external fields. Liquid crystals with such phases are tunable, self-assembled, photonic band gap materials; they offer exciting opportunities both in basic science and in technology. Since the density of photon states is suppressed in the stop band and is enhanced at the band edges, these materials may be used as switchable filters or as mirrorless lasers. Disordered periodic liquid crystal
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Chen, Mingce, Wenda He, Dong Wei, et al. "Depth-of-Field-Extended Plenoptic Camera Based on Tunable Multi-Focus Liquid-Crystal Microlens Array." Sensors 20, no. 15 (2020): 4142. http://dx.doi.org/10.3390/s20154142.

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Plenoptic cameras have received a wide range of research interest because it can record the 4D plenoptic function or radiance including the radiation power and ray direction. One of its important applications is digital refocusing, which can obtain 2D images focused at different depths. To achieve digital refocusing in a wide range, a large depth of field (DOF) is needed, but there are fundamental optical limitations to this. In this paper, we proposed a plenoptic camera with an extended DOF by integrating a main lens, a tunable multi-focus liquid-crystal microlens array (TMF-LCMLA), and a com
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Lin, Hung-Chun, and Yi-Hsin Lin. "A fast response and large electrically tunable-focusing imaging system based on switching of two modes of a liquid crystal lens." Applied Physics Letters 97, no. 6 (2010): 063505. http://dx.doi.org/10.1063/1.3479051.

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Joshi, Pankaj, Oliver Willekens, Xiaobing Shang, et al. "Tunable light beam steering device using polymer stabilized blue phase liquid crystals." Photonics Letters of Poland 9, no. 1 (2017): 11. http://dx.doi.org/10.4302/plp.v9i1.704.

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A polarization independent and fast electrically switchable beam steering device is presented, based on a surface relief grating combined with polymer stabilized blue phase liquid crystals. Switching on and off times are both less than 2 milliseconds. The prospects of further improvements are discussed. Full Text: PDF ReferencesD.C. Wright, et al., "Crystalline liquids: the blue phases", Rev. Mod. Phys. 61, 385 (1989). CrossRef H. Kikuchi, et al., "Polymer-stabilized liquid crystal blue phases", Nat. Mater. 1, 64 (2002). CrossRef Samsung, Korea, SID exhibition, (2008).J. Yan, et al., "Direct m
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Gleeson, Helen F., and S. Kaur. "Liquid crystal contact lenses with graphene electrodes and switchable focus." MRS Advances 1, no. 52 (2016): 3509–15. http://dx.doi.org/10.1557/adv.2016.467.

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ABSTRACTPresbyopia is a ubiquitous age-related disability of the eye, affecting an estimated 1.04 billion people worldwide, reducing their ability to focus on nearby objects. The various solutions to this inevitable vision deterioration are not compromise-free, with a growing need for approaches beyond conventional spectacles. The research motivation for this work is the unique solution offered by liquid crystal (LC) contact lenses to create compromise-free vision across the whole field of view. The distinctive property of LC lenses is that they are switchable, with the application of a voltag
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Dissertations / Theses on the topic "Large area tunable liquid crystal lens"

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Jamali, Afsoon Jamali. "LARGE AREA TUNABLE LIQUID CRYSTAL LENS." Kent State University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=kent1541671894328594.

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Chen, Hung-Shan, and 陳宏山. "Large aperture liquid crystal lenses with tunable lens powers and applications." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/8t3327.

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Liao, Chen-Hao, and 廖振豪. "Polarization-Independent Liquid Crystal Lens array with large tunable focal length and Its application in Distortion Correction." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/xz9xa4.

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碩士<br>國立彰化師範大學<br>光電科技研究所<br>102<br>This thesis demonstrates a liquid crystal (LC) microlens array (MLA) fabricated by liquid crystals (LCs) having the negative dielectric anisotropy, in conjunction with the cell having the three electrodes structure. The demonstrated LC MLA is polarization-insensitive and can be operated in the concave mode and the convex mode, respectively. In the concave mode, the shortest focal length of the LC MLA is -2.54 mm; in the convex mode, the shortest focal length of the LC MLA is 2.22 mm, respectively. Furthermore, owing to the vertical alignment-treated LCs, the
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